the charging pile is similar in function to the tanker inside the gas station. it can be fixed on the ground or wall, installed in public buildings (public buildings, shopping malls, public parking lots, etc.) and residential parking lots or charging stations. it can be based on different voltage levels. charge various types of electric vehicles. the input end of the charging post is directly connected to the ac grid, and the output end is equipped with a charging plug for charging the electric vehicle. the charging pile generally provides two charging modes of normal charging and fast charging. one can use a specific charging card to swipe the card on the human-computer interaction interface provided by the charging pile, and perform corresponding charging mode, charging time, cost data printing and the like. the charging pile display can display data such as charge amount, cost, and charging time. multiple high-power fets are required on the charging post, as shown in the circuit below.